ExHale CO2 Bag

From: £35.95

The ExHale CO2 Bag enables you to have immediate access to carbon dioxide when you need it! This product prevents any waste and is a self-activated bag with a 3-month shelf life but will give you 6-9 months of continuous CO2 supply once activated.

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The ExHale CO2 Bag

The ExHale CO2 Bag enables you to have immediate access to carbon dioxide when you need it! This product prevents any waste and is a self-activated bag with a 3-month shelf life but will give you 6-9 months of continuous CO2 supply once activated.

This is the first self-activated CO2 Bag in the world. It remains the CO2 Bag with the longest life, has no need for maintenance, gives off no heat and requires no electricity. Perfect for growers who seek a viable source of carbon dioxide for use in their hydroponic growing system.

The CO2 Bag offers the hydroponic grower considerable worthwhile attributes, including:

  • The highest CO2 production takes place 30 to 45 days following activation
  • Instant CO2 production immediately after activation
  • Shelf life of 3 months (before activation)
  • Nine months of carbon dioxide distribution
  • Spawn strain is award-winning
  • A guaranteed steady supply of CO2 for six or nine months
  • Zero maintenance necessary
  • Entirely ideal for organic production
  • No need for electrical power
  • Zero heat emitted
  • Hang bags via separation seam

Why Do I Need to Add CO2 to My Hydroponic Setup?

Simply because CO2 + H2O + light = photosynthesis. So it’s always a good move to have a reliable source of carbon dioxide ready when you need it.

Increasing carbon dioxide levels increase photosynthesis activity in your plants directly related to sugar production, how plants convert light into energy.

If you are drawing air into your hydroponic system from your home, you’ll likely achieve a CO2 level of around 600ppm. This is only about half of the recommended level of CO2 that plants will need to flourish, which is around the 1200ppm mark. Therefore you’ll need some reliable way of making up the difference.

Even a small extra amount of CO2 is known for the following enhanced qualities:

  • Increased yield
  • Stronger plants
  • More rapid plant growth
  • Greater assistance to help plants deal with heat stress
  • Optimised use of grow lights

How Does it Work?

The ExHale CO2 Bag is necessary when looking at how vital this carbon dioxide is as part of hydroponic growing.

All plants need CO2 (carbon dioxide) to survive. This CO2 is what we expel when we breathe out, and it’s what plants use to start their photosynthetic processes. Plants inhale CO2 throughout the day and exhale CO2 at night. We measure the level of CO2 in any given environment in parts per million (PPM), and ambient room levels are generally in the region of around 400 to 800ppm. Assuming that you have adequate and healthy air circulation in your growing room or tent, you should achieve the minimum recognised standard level of 390ppm.

At this level, plant growth should be similar to what you see in your garden.

If the carbon dioxide level drops below 200ppm, your plants will stop growing.

The most obvious and significant benefit to your plants of having a good supply of carbon dioxide is the increase in growth that is bound to occur. Especially true if you optimise your hydroponic setup to the max.

Maintaining CO2 levels around the 1000 to 1200ppm mark will enable you to have your grow room or grow tent run at a higher temperature. This can be crucially important with growers struggling to keep temperatures lower and to avoid the kind of temperature stress to your plants that they can well do without.

CO2 During Vegetation

During the plant’s vegetative stage, adding carbon dioxide is the most beneficial way to increase and maximise the plant’s “stretch”. Allowing your plants to grow with considerably more vegetative development in a much shorter time.

This can only be good for increasing the sheer size and the frequency of harvests and is good news all round.

CO2 During Flowering

When adding carbon dioxide to your growing room or tent, the flowering stage of your plants is the most important. So if you add CO2 to your growing space (and this is especially true in the first 2 or 3 weeks of the plants’ flowering stage), you’ll be able to kick-start flower (or fruit) production and boost the flower (or fruit) size and quality significantly.

Adding CO2 to Your Growing Room or Grow Tent

Using The ExHale CO2 Bags is the most natural means of adding carbon dioxide to your growing space environment. The product will cultivate carbon dioxide 24 hours a day, without any refill supplies or expensive equipment or hardware.

Plants work through photosynthesis, which is how a plant’s leaves manufacture carbohydrates. The crucial mixture of sunlight, CO2 and water are all converted into carbohydrates plus oxygen entirely by the extraordinary action of chlorophyll within the chloroplasts of your plants.

Growing plants indoors using artificial light instead of sunlight often lacks sufficient carbon dioxide to photosynthesise in any efficient or viable way. But when plants find a way to maximise this chemical reaction of photosynthesis, the resultant yield will always be larger plants of higher quality and abundant blooms and fruit.

The secret lies in what’s known as the mycelial mass, which exists within the vented cultivator. This mycelial mass cultivates CO2, and the product’s “breather patch” releases a steady flow of CO2 continuously for anything up to 6 months from the moment of activation.

Pro Tip: You should be aware that because carbon dioxide is heavier than air, you should suspend the bag containing this product at the very top of the grow room ceiling to provide a generous shower of CO2 right over your plants.

How to Use?

When using these bags, you need to be aware of the safety aspects of this use and its implications.

Any high levels of carbon dioxide may be dangerous. Particularly sealed indoor grow spaces may quickly trap hazardous amounts of CO2, leading to some fairly severe health conditions. Dizziness may lead to unconsciousness if essential checks and balances aren’t put in place right at the start before such events are allowed to happen.

You can buy CO2 safety monitors, which are particularly important when dealing with CO2 within a sealed environment.

For best results, you should consider the following:

  • Hang this slightly above plants to avoid creating a shadow
  • Locate the product on the opposite side of the space to your extractor fan(s)
  • Make sure to keep the air circulated (with a circulation fan) to keep CO2 levels even
  • Increase feed if necessary to support the increase in growth gained from adding CO2


This product is available in two sizes, and each of these has its specific purpose and usage.

  • ExHale Regular: Works for up to six months in small to medium-sized growing areas and tents.
  • ExHale XL: Works for up to nine months in medium to large growing areas and tents.

Where Can I Buy the ExHale CO2 Bag?

You can easily buy the ExHale CO2 Bag from our website. Alternatively, there’s the 365 bag from ExHale available here.

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